The EVOline Axial Rolling Heads from FETTE Werkzeugtechnik, a member of the LMT Tools family and market leader in the field of rolling systems, stand for short manufacturing times, high thread strength, outstanding tool life, and maximum process reliability. The next evolutionary stage now follows with the new generation. It has been specifically developed for large threads in high-strength materials and offers an efficient alternative to conventional rolling machines. A practical example from the energy sector demonstrates its capabilities: up to 50% time savings and thus double output in unmanned operation.
With the new generation EVOline Axial Rolling Heads, LMT Fette offers an efficient, maintenance-friendly, and economical solution for process-safe and automated manufacturing of large threads in high-strength materials. The product family includes four sizes – F55 EVO, F65 EVO, F75 EVO, and F85 EVO – and is designed for high-strength steels up to 1,400 N/mm², hardness range up to HRC 44, as well as thread sizes up to M100 and pitches up to 6 mm.
Long tool life with high productivity
The geometrically optimized design and the use of high-performance materials achieve a robust, durable, and low-wear construction. This leads to longer tool life and reduces maintenance effort to a minimum. Up to 100,000 components can be produced per maintenance interval. The Axial Rolling Heads can be seamlessly integrated into existing machine environments and enable precise, fully automated processes. Complete machining in one line reduces handling and auxiliary times, increases process stability, and boosts productivity. Thus, the rolling heads offer a significant advantage over conventional stand-alone rolling machines, which require time-consuming manual steps and a high personnel effort. The result: a more efficient manufacturing process and sustainably lower costs per component.
Economic solution for automated series processes
"Rolled threads offer about 30% higher strength than cut threads and are therefore often the first choice for safety-relevant components. With the new generation of EVOline Axial Rolling Heads, we consistently transfer these advantages to large threads in high-strength materials and create an economic solution for automated series processes," says Anita Tritschler, Global Product Manager Rolling Systems at LMT Tools. Typical users are companies that require reliable and economical processes – especially from energy generation and supply, construction and infrastructure, oil and gas industry, as well as machinery and system engineering.
Manufacturing of threaded bolts for wind turbines with the F75 EVO
How powerful the new generation EVOline Axial Rolling Heads is demonstrated by an example from wind power. Threaded bolts with double-sided thread M64x6 and 250 mm thread length are manufactured from material of strength class 10.9 with a tensile strength of 1,000 N/mm². The starting point was a rolling machine embedded in a heavily manually shaped process chain. Time-consuming work steps, high handling effort, and a correspondingly high personnel deployment significantly affected manufacturing and piece costs. With the switch to the EVOline Axial Rolling Head F75 EVO, a fully automated, linked process with simultaneous machining was realized, including AKEA feed unit and automatic workpiece loading. The result: about 50% less manufacturing time per component and thus double output. "The practical case shows what is possible when the rolling process is integrated into a fully automated manufacturing structure. With the new generation of EVOline Axial Rolling Heads, costs per component can be significantly reduced and competitiveness sustainably strengthened," says Anita Tritschler.
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